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Abstract:

Birds play several roles in agricultural lands and respond to habitat heterogeneity within the agricultural landscape. Agricultural intensification in Argentina has increased the sown area, mainly with soybean, fragmenting landscapes in the pampas and mesopotamic region. In Entre Ríos Province, the original Espinal forest has been fragmented, leaving remnant patches of natural vegetation, in cases modified by cattle grazing. These changes represent a potential threat for avian conservation. In Entre Ríos, terraces may be a useful habitat in maintaining avian diversity, similar to other non-cropped linear habitats in agricultural landscapes. We tested the hypothesis that habitat heterogeneity created by terraces would maintain higher species richness and densities of avian species that use original or modified forests within cropped areas compared to fields without terraces. The study was carried out in soybean fields with an adjacent forest and either herbaceous, shrub or no terraces in two periods (March-April 2004). Birds were surveyed using line transects in field interior and edge, and observations were carried out in one forest remnant adjoining each field. Most bird species recorded in soybean fields were insectivorous or consume invertebrates during the breeding season. Species richness, total bird density and the density of granivores, insectivores and omnivores were higher in fields with terraces than in fields without terraces. Moreover, shrub terraces had higher effect on species richness and bird density than herbaceous terraces. Our results suggest that terraces may serve as a possible tool for maintaining avian diversity in agroecosystems in Entre Ríos.

Registro:

Documento: Artículo
Título:The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina
Autor:Goijman, A.P.; Zaccagnini, M.E.
Filiación:Facultad de Ciencias Exactas y Naturales, Universidad de Buenos Aires, Argentina
Grupo Biodiversidad y Gestión Ambiental, Proyectos Internacionales, Instituto Nacional de Tecnología Agropecuaria (INTA), Cerviño 3101, 1425 Buenos Aires, Argentina
Grupo Biodiversidad y Gestión Ambiental, Instituto de Recursos Biológicos, CIRN, Instituto Nacional de Tecnología Agropecuaria (CNIA-INTA), Los Reseros y Las Cabañas s/n, 1712 Castelar, Provincia de Buenos Aires, Argentina
Palabras clave:Agricultural landscape; Birds; Forest; Soybean; Terraces; Aves; Bos; Glycine max; Invertebrata
Año:2008
Volumen:23
Número:2
Página de inicio:67
Página de fin:76
Título revista:Hornero
Título revista abreviado:Hornero
ISSN:00733407
Registro:https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00733407_v23_n2_p67_Goijman

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Citas:

---------- APA ----------
Goijman, A.P. & Zaccagnini, M.E. (2008) . The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina . Hornero, 23(2), 67-76.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00733407_v23_n2_p67_Goijman [ ]
---------- CHICAGO ----------
Goijman, A.P., Zaccagnini, M.E. "The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina " . Hornero 23, no. 2 (2008) : 67-76.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00733407_v23_n2_p67_Goijman [ ]
---------- MLA ----------
Goijman, A.P., Zaccagnini, M.E. "The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina " . Hornero, vol. 23, no. 2, 2008, pp. 67-76.
Recuperado de https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00733407_v23_n2_p67_Goijman [ ]
---------- VANCOUVER ----------
Goijman, A.P., Zaccagnini, M.E. The effects of habitat heterogeneity on avian density and richness in soybean fields in entre Ríos, Argentina . Hornero. 2008;23(2):67-76.
Available from: https://bibliotecadigital.exactas.uba.ar/collection/paper/document/paper_00733407_v23_n2_p67_Goijman [ ]